mbox: Avoid crashing when getting GUID or header-md5 in some conditions. mbox file can be opened and locked (especially with pop3_lock_session=yes) without actually creating a stream for it.
mbox: Avoid crashing when getting GUID or header-md5 in some conditions.
mbox file can be opened and locked (especially with pop3_lock_session=yes)
without actually creating a stream for it.

Distrotech/dovecot,Distrotech/dovecot,Distrotech/dovecot,Distrotech/dovecot,Distrotech/dovecot